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1. An industrial crane is operated by four electric motors working together. For the crane to perform prop- erly, the four motors have to generate a total of at least 380 horsepower. Engineers from the plant that produces the electric motors have stated that motors off their assembly line average 100 horsepower, with a standard deviation of 10 horsepower. The four electric motors on the crane have just been replaced with four brand new motors from the motor manufacturer. A safety engineer is concerned that the four motors might not be powerful enough to properly operate the crane. Stating any addi- tional assumptions you are using, does the engineer's concern appear to be justified?
2. From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a mean of 80 pounds and a standard deviation of 20 pounds. The plane is consistently fully booked and holds 100 passengers. The pilot insists on loading an extra 500 pounds of fuel whenever the exceeds 8300 pounds. On what percentage of the flights will she end up having the extra fuel loaded?
a wildlife study has found that a wolf pack is successful in killing one large animal for every 12 that it chases.a
the hourly wages in a particular industry are approximately normally distributed with mean 15.00 and a standard
Find the least-squares regression line - Find the least squares estimates of γ0 and β1.
after finishing the competition in 24th place you have a little extra spending money to have fun with in vegas.
What is the standard general score conversion formula? Is this the same as a z-score formula? Which leads me to ask How do you convert from one standard score to another?
If one invested in Stock A, Determine standard deviation of percentage return?
Summarize the case in 1-2 paragraphs. Explain which of the HR practices described in the case you think contribute to greater efficiency and effectiveness of TSA employees. Why? Recommend at least two other practices which could be employed to inc..
a production manager wants to determine how many units of each product to produce weekly to maximize weekly profits.
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. What is the probability that 4 or more of the calculators will be defective?
In each of the following cases. find the mean , variance and standard of the sampling distribution of sample proportion p.
review the three non-parametric test videos in the calculations section of the statistics visual learner media
an accounting firm is planning for the next tax preparation season. from last years returns the firm collects a
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